Antidiagonal sums of the convolution array A213773.

Terms

a(0) =1a(1) =12a(2) =60a(3) =190a(4) =465a(5) =966a(6) =1792a(7) =3060a(8) =4905a(9) =7480a(10) =10956a(11) =15522a(12) =21385a(13) =28770a(14) =37920a(15) =49096a(16) =62577a(17) =78660a(18) =97660a(19) =119910a(20) =145761a(21) =175582a(22) =209760a(23) =248700a(24) =292825a(25) =342576a(26) =398412a(27) =460810a(28) =530265a(29) =607290